Column pump



FIG. 1 is a first perspective view of a column pump showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is an enlarged top plan view thereof;

FIG. 8 is an enlarged bottom plan view thereof;

FIG. 9 is an enlarged view of portion 9 in FIG. 1;

FIG. 10 is an enlarged view of portion 10 in FIG. 2; and,

FIG. 11 is an enlarged view of portion 11 in FIG. 2.

The broken lines in the drawings illustrate portions of the column pump which form no part of the claimed design. 

CLAIM The ornamental design for a column pump, as shown and described. 